Reply
 
Thread Tools Display Modes
 
Old 01-23-2019, 11:57 AM   #1
Skoolie
 
Join Date: Sep 2017
Location: Kalispell, Montana
Posts: 100
Year: 1993
Chassis: MD463
Engine: DT466
Simple tool to figure out how much battery storage you need.

Over the last few days I have been asking people how much power they use in their bus. What I have come to figure out is, many people struggle with the conversions.

So here is an easy to use way to calculate how much power you need. https://everydaycalculation.com/ah-kilowatt-hour.php

My system needs about 6kwH per day. And I want to have enough storage to last 4-5 days without needing to charge anything. So for 5 days I need at least 30kwH total. But to ensure I am only using 50% of the battery, I need to double my storage amount to 60kwH.

A lot of people struggle to then figure out, how does that convert to aH (Amp Hours). In the example below, you will see that 60kwH or 60,000wH would require 1250aH of battery storage to run for 5 days, using 6kwH per day without needing to charge.

hunter.png
yaakbus is offline   Reply With Quote
Old 01-23-2019, 12:02 PM   #2
Bus Geek
 
o1marc's Avatar
 
Join Date: Dec 2017
Location: Dawsonville, Ga.
Posts: 6,863
Year: 1999
Coachwork: Genesis
Chassis: International
Engine: DT466/3060
Rated Cap: 77
Is the 5 day storage based on not being in the sun for that period? If everything is working properly is the system maintaining itself if charging correctly?
o1marc is online now   Reply With Quote
Old 01-23-2019, 12:19 PM   #3
Skoolie
 
Join Date: Sep 2017
Location: Kalispell, Montana
Posts: 100
Year: 1993
Chassis: MD463
Engine: DT466
Exactly. I hunt and fish in Alaska and Norther Canada a lot and there are times in the winter when there literally is no sun. So rather then have to start the generator every few hours to keep things charged, I just wanted to make sure that I never had worry about power. And if I did, know that 5 gallons of gas could recharge my system 3-4 times before being in a whole world of ****. So what I am trying to do is by me a full 30 days in the middle of know where, incase something goes sideways and need to call for help via sat phone or there is a massive storm that I need to ride out.

Quote:
Originally Posted by o1marc View Post
Is the 5 day storage based on not being in the sun for that period? If everything is working properly is the system maintaining itself if charging correctly?
yaakbus is offline   Reply With Quote
Old 01-23-2019, 12:21 PM   #4
Skoolie
 
Join Date: Sep 2017
Location: Kalispell, Montana
Posts: 100
Year: 1993
Chassis: MD463
Engine: DT466
And that is if I consumed the power like I normally would. If I only used it for heat and lights, I could ride it out for much longer.

Quote:
Originally Posted by o1marc View Post
Is the 5 day storage based on not being in the sun for that period? If everything is working properly is the system maintaining itself if charging correctly?
yaakbus is offline   Reply With Quote
Old 01-23-2019, 12:23 PM   #5
Bus Geek
 
o1marc's Avatar
 
Join Date: Dec 2017
Location: Dawsonville, Ga.
Posts: 6,863
Year: 1999
Coachwork: Genesis
Chassis: International
Engine: DT466/3060
Rated Cap: 77
Have you considered a switch to charge the batteries off the engine alternator? Another safety feature if your stranded in the boonies.
o1marc is online now   Reply With Quote
Old 01-23-2019, 12:30 PM   #6
Skoolie
 
Join Date: Sep 2017
Location: Kalispell, Montana
Posts: 100
Year: 1993
Chassis: MD463
Engine: DT466
I have but that also means using the diesel I need to drive out of the boonies, to stay warm. Running out of fuel would complicate the problem haha.

But I like where your head is, off-grid, like we the freaking heck off grid haha.

Quote:
Originally Posted by o1marc View Post
Have you considered a switch to charge the batteries off the engine alternator? Another safety feature if your stranded in the boonies.
yaakbus is offline   Reply With Quote
Old 01-23-2019, 12:37 PM   #7
Bus Geek
 
o1marc's Avatar
 
Join Date: Dec 2017
Location: Dawsonville, Ga.
Posts: 6,863
Year: 1999
Coachwork: Genesis
Chassis: International
Engine: DT466/3060
Rated Cap: 77
Quote:
Originally Posted by yaakbus View Post
I have but that also means using the diesel I need to drive out of the boonies, to stay warm. Running out of fuel would complicate the problem haha.

But I like where your head is, off-grid, like we the freaking heck off grid haha.
So your choice becomes stay warm or get the hell out. How long can you run to charge the batteries on a gallon of fuel?
o1marc is online now   Reply With Quote
Old 01-23-2019, 12:46 PM   #8
Skoolie
 
Join Date: Sep 2017
Location: Kalispell, Montana
Posts: 100
Year: 1993
Chassis: MD463
Engine: DT466
It will take about 5.5 hours to fully charge the system from the generator. And my generator will run for 20+ish hours on 5 gallons of fuel.

I have not calcualted it from the bus but I imagine its not as fast as the generator.

Quote:
Originally Posted by o1marc View Post
So your choice becomes stay warm or get the hell out. How long can you run to charge the batteries on a gallon of fuel?
yaakbus is offline   Reply With Quote
Old 01-25-2019, 09:53 AM   #9
Bus Nut
 
Yukon Cornelius's Avatar
 
Join Date: Apr 2018
Location: Goose Bay NL
Posts: 381
Year: 1997
Coachwork: Thomas
Chassis: International
Engine: T444E
Rated Cap: 72
Love the thoroughness towards efficiency and longevity for your off grid boondocking, as well as the location you choose to do it
__________________
Yukon

Handyman and Shenaniganizer
http://www.skoolie.net/forums/f11/97...ion-22324.html
Yukon Cornelius is offline   Reply With Quote
Old 01-25-2019, 09:58 AM   #10
Skoolie
 
Join Date: Sep 2017
Location: Kalispell, Montana
Posts: 100
Year: 1993
Chassis: MD463
Engine: DT466
Thank You! Definitely not an expert but for sure open to all views on how to achieve the goal. I had a little awakening from a pretty in depth convo on another post I made, but in the end got the outcome i was looking for!
yaakbus is offline   Reply With Quote
Reply

Tags
electrical, power, solar, solar batteries, solar system

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 08:58 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.